well the thing is you can be both. Many indigo's are starseeds and vice versa. Indigo is just a spiritual level so to speak. There's indigo, crystal, then rainbow and prolly more after that. Anyhow a starseed is just a soul that has not originated from earth. Quite often starseeds are having their first incarnation on earth but many have been here much longer and some have even forgotten that they are starseeds.